Scale



3 Sheets-Sheet l April *19' 1927 w. F. sTlMPsoN SCALE Filed Dec. ll 1922 I 5 Sheets-Sheet 2 Giro: n

April 19,1927.

W. F. STIMPSON s'cALE Filed Dec. ll. 1922 3 Sheets-Sheet 3 il (l Patented Apr. 19, 1927.

PATE-NT OFFICE'.

WALTER F. STIMPSON, OF LOUISVILLE, KENTUCKY.

SCALE.

Application filed December 11, 1922. Serial No. 606,189.

The invention relates to scalesand more particularly to the type known as automatic counter' scales. -It is the primary object of the invention to simplify and cheapen the construction and at the same time to obtain various other advantages, vas reducing the space occupied and provision for cleaning the counter beneath the scale base. The invention therefore consists in various features ot construction as hereinafter set forth.

In the drawings: l

Figure l is a. vertical longitudinal section through the scale, being partly in elevation.

Figure 2 is a perspective view of the base detached Figure 3 is a perspective View of the platform lever viewed in reverse position Figure 4 is a perspective view of the` cap or cover plate tor the base of the hollow olu1nn; y

Figure 5 is a cross-section through the central bar of the base and housing for the adjustment rod,

Figure 6 is a` plan view; y y

Figure 7 is a section on line 7-7 of Fig. 6.

The type of scale to which my improvements are yapplied is usually constructed with a base section for enclosing the plat- 'torm lever, a hollow column rising from one end of the base and housing the steelyard rod and the weighing springs or weights, and an indicator at the top' of the column actuated by the mechanism therein. To simplify the construction I have substituted for the usual form of hollow base a skeleton 'frame which rigidly connects the fulcrum bearings for the weighing lever with the base of the hollow column, but which is cut away s0 as to permit of cleaning the counterr beneath the base and also exposing the platform. supporting lever, This not only simplifies the construction of the base itself, but also facilitates assembly, reduces the space occupied and produces a novel and pleasing appearance.

In detail, A is the base, which is composed ot'a portion B, constituting 'the base of 'the hollow column and a portion C of greater' width connected to said portion B by the longitudinally extending central bar D and a pair of angling brace bars E and E". These parts are vreferably formed integral by casting and fille portions B and C are further provided with depending lugs F for the attachment of adjustable supporting feet G.

The portion C comprises the segmental vertically extending flange, which encloses and conforms substantially to the sha e of the platform supporting lever. This lange extends around the sides of the lever and at points directly abovethe lugs F isincreased win thickness and provided with recesses H for receiving the fulcrum rbearing blocks for the lever. 'liese bearing blocks l may be formed of agate, or other suitable material., and may be set by cement in the recesses, being properly alignedby the use of suitable End pla-tes l are secured to the outer face vofthe flange covering the recesses and serve to hold the platform pivots from displacement. f

K is the plat-form supporting lever, which preferably of a substantially anchorsi'iaped torfm having the central stem portion L which extends into the base oii the hollow column, the end portionM extending laterally from the stem L and the parallelly arranged arms N andN projecting from the opposite sides of thememb'er and carrying the knife-edge pivots O and O. The portionM, which is forward of the tulcrum pivots O, is of suliicient mass to 'form a counter-weight for the arm L and stcelyard rod sup )orted thereon. Centrally ot' this portion l there' is formed a recess or pocketv on the under side of the lever, which is adapted to receive the thermostat P, this being ot' the collapsible bellows `type and being connected toa rod P extending through a channel in the arm L. The forward end of the rod-P isy connected toa slidable member carrying the point pivot P2 which forms the connection with the steelyard rod, and therefore, the movement'-,imparted to the rod P byY operation of tlietlierinostat willcompenlength of the lever arm. The thermostat P may be adjusted by means of a screw Pg located in a counter-sunk recess at the front of the member M. Theleverl is of a Width to titl within the base with the ulcr'um pivots O engaging the bearings lA and the arm L extending through van opening B intothe space within the co` umn base B. A vca member Q is then placedy about the Hangs (il covering the forsate for anyfexpansion or contraction in the ward end 0f the lever K and having port-ions (l, which extend over and cap the recesses H for the hearing blocks T. The portions Q are also extended inwardly at Q2 so as to overlap the portions of the arms N and N from which the fulcrum pivots O project. Thus dust and dirt is prevented from collecting upon the knife-edge pivots, or .finding access to the hearings. The cap Q is further provided at the center thereof with a forwardly projecting fiat portion Q3. Upon this fiat portion is mounted a detachable level unit comprising a circular housing y with a pair of transversely extending level tubes set in cement therein.

My improved construction of base and platform lever may be used with any suit able construction of indicating and weighing mechanism, but as shown, R is a hollow col-- umn rising from the column base B and car rying at its upper end the cylindrical housing R containing' the indicating mechanism (not shown). The weighing springs ll are arranged within the hollow column arm and are in operative engagement with the steelyard rod S, which latter engages the point pivot bearing P2 on the arm L. The supporting frame T for the weighing plat form is provided with depending lugs T which engage the knife edge pivots O projecting laterally from the arms N and N. A check rod U connected to the rear end of the supporting' frame T extends upward into the housing R and is provided with suitable means (not shown) for permitting the vertical oscillation of said frame while holding the same in stable condition.

To provide freedom for the oscillation of the arm L, the column R and support-ing base B have secured thereto a vertically slotted cap V. This cap has the hood portion V projecting laterally therefrom and overlapping the lever to give a more finished appearance. The cap V also conceals the bolts lV, which secure the column R to the base B.

Tn the sealing of the scale, it is necessary to vertically adjust the anchorage for the weighing springs R2. I have provided a convenient means for accomplishing this from the front of the scale, comprising a rod having a screw-threaded engagement with the lug X depending from the central har D of the base. This rod X passes heneath the har D longitudinally thereof and at its rear end passes through a bearing X2 into engagement with a depending arm of a bell crank lever X3. The lever X3 is fulcrumed within the base B, its depending arm passing through a slot Xt in said base and being provided with one or more rearwardly extending arms X5 which engage rods X6 extending upward to the anchorage hearing for the springs R2. The arrangement is such that a rotative adjustment of the rod will have the effect of raising or lowering the anchorage bearing for the springs, thereby changing the adjustment. This adjustment can be made by the use of a screw driver, or other suitable tool, engaging the forward end of the rod X.

That I claim as my invention is:

l. A scale base comprising a column base portion, a fulcrum portion of greater width arranged in alignment therewith, and a skeleton open frame connecting said portions.

2. A scale hase comprising a column hase portion, a fulcrum portion of greater width arranged in horizontal and transverse alignnient and having a closed front, and an open skeleton frame connecting said portions.

3. A scale base comprising a column base portion, a portion of greater width provided with fulerum bearings for the platform lever and also a closed front for concealing said lever, and an open skeleton frame connecting said portions.

et. A scale base comprising a column base portion having` one or more depending supporting feet, a portion of greater width having depending' feet, fulcrum bearings for the platform lever and a closed front partially concealing said lever, and an open skeleton frame connecting said portions.

5. A scale comprising a hollow column for supporting the weighing and indicating mechanism, a platform, a platform supporting lever and a base comprising a portion for supporting said hollow column provided with a slotted opening for the passage of a platform supporting lever, a portion of greater width forming fulcrum bearings for the platform supporting lever and provided with a closed front for partially concealing said lever, and an open skeleton frame connecting said portions.

G. A scale base comprising a hollow column supporting portion having an opening at its front, a port-ion of greater width provided with fulcrum bearings for the platform supporting lever and forming a closed front for partially concealing said lever, evell'ing means mounted on said closed front, a skeleton frame connecting said portions, and a cap for closing the open front of said column-supporting portion, said cap being centrally vertically slotted for the passage and oscillation of the platform-snpporting lever,

T. A scale base comprising a front portion having a vertically extending flange around the front and the sides thereof, heilig recessed at its sides to receive fulcrum supporting bearings, a rear portion for supporting a column, a plurality of bars for connecting said front and rear portion and holding the same in rigid relation, a platform supporting lever engaging said fulcruin bearings and having an arm extend ing into said column supporting portion, and a cap or cover for said front portion partially concealing said platform supporting lever and covering said fulcrum bearings.

8. A scale base comprising feet-supported front and rear portions, respectively for the fulcrum supporting bearings and the column support, an open skeleton frame connecting said portions, a platform supporting lever fulcrun'ied in said front portion and extending into said rear portion, and a cap for covering said front portion partially concealing said lever and covering the fulcrum bearings therefor.

9. A scale base comprising a rear portion and a front portion of greater Width having platform supporting bearings at its opposite sides. a central bar connecting said portions and obliqnely extending brace bars also connecting said portions.

10, A scale base comprising a rear portion, a front portion of greater Width having fulorum supporting bearings at its opposite sides, converging brace bars extending from said front to said rear portion and a center bar also connecting said portions.

11. ln a scale an anchor-shaped plat-form supporting lever having a central longitu* dinally extending arm, a curved head, and arms extending from opposite sides of said curved head parallel to each other and to said central arm and provided with laterally extending pivot bearings.

v12. In a scale, an anchor-shaped platform supporting lever having a curved head portion. an arm extending centrally from said head having a hollow portion for receiving a thermostat, and a pair of arms extending from opposite sides of said curved head parallel to each other and to said central arm and being provided with laterally extending pivot bearings.

13. A scale hase comprising a rear column-supporting portion provided With depending feet, a front portion of greater Width also provided with .depending feet and forming fulcrum bearings for the platform supporting lever, a bar extending centally from said front to said rear portions, having depending lugs at opposite ends thereof, yan adjustmentrod engaging bearings in said depending lugs and extending beneath said bar, and a housing extending between said lugs and enclosing said bar.

14. A scale base comprising a rear portion for supporting a column, a front portion of greater Width having a vertical flange extending across the same and partly around the sides, said side portions being slotted to receive fulerum bearings, a platform supporting lever having fulcrum pivots for engaging said bearings, and a cap secured to the flange of said front portion covering said recesses for the fulcrum snpporting bearings and extending laterally to cover the fulcrum pivots, said cap partially covering and concealing said platform snpporting lever.

15. A scale base comprising a rea-r portion for supporting a column, a front portion of greater Width provided with fulcrnm bearings for the platform supporting lever, a cap for said front portion having a central rearward projection, and a level secured to said rearward projecting portion.

In testimony whereof I aihx my signature.

WALTER F. STIMPSON. 

